<template>
	<view>
		<!-- 使用自定义组件 ,可以动态修改颜色值-->
		<my-search :bgcolor="'#FFB6C1'" :radius="20" @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view scroll-y="true" class="left-scroll-view" :style="{height: wh + 'px'}">
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',i === active? 'active' : '']" 
					@click="activeChanged(i)">{{item.catName}}</view>
				</block>				
			</scroll-view>
			<!-- 右侧的滑动区域 -->
			<scroll-view scroll-y="true" class="right-scroll-view" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">/{{item2.catName}}/</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item项 -->
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 (原地址有改动)-->
							<image :src="item3.catIcon.replace('dev','web')"></image>
							<!-- 三级分类的文本 -->
							<text>{{item3.catName}}</text>
						</view>
					</view>
				</view>
				
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				// 当前设备可用高度
				wh: 0,
				// 分类列表
				cateList: [],
				active: 0,
				// 二级分类列表
				cateLevel2: [],
				scrollTop: 0
			};
		},
		onLoad() {
		const sysInfo = uni.getSystemInfoSync()
		this.wh = sysInfo.windowHeight - 50
		this.getCateList()
		},
		methods:{
		async getCateList(){
				// const { data: res} = await uni.$http.get('/api/public/v1/categories')
				const { data: res} = await uni.$http.get('/api/public/categories')
				if(res.code !== 200) return uni.$showMsg()
				this.cateList = res.data
				this.cateLevel2 = res.data[0].children
			},
			activeChanged(i){
				this.active = i
				// 重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].children
				this.scrollTop = this.scrollTop === 0 ? 1: 0
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' +item.id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	// 自由布局
	display: flex;
	.left-scroll-view{
		width: 120px;
		.left-scroll-view-item{
			background-color: #f7f7f7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			
			&.active{
				background-color: #FFFFFF;
				position: relative;
				&::before{
					content: '';
					display: block;
					width: 3px;
					height: 30px;
					background-color: #FFB6C1;
					position: absolute;
					top: 50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
		}
	}
	
}
.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		text-align: center;
		margin-bottom: 10px;
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
		}
	}
}
</style>
